New York Ultra Running
- Contains details about races in the area, highlights, pictures, directions, and membership details.

North Texas Trail Runners
- Information on trail running and ultra running in North Texas. Features calendar listings and a news/opinion section.

Run100s (Run Hundreds)
- Stan Jensen's ultramarathon guide, especially focusing on 100 mile events and others in northern California. Includes information and statistics for the top races in the USA, personal achievements, and goals.

Sri Chinmoy Marathon Team
- Organiser of ultrarunning events in more than 30 nations, including the world's longest certified race of 3,100 miles in New York. News, photos, race information and results.